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14 Cards in this Set
- Front
- Back
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Continental Drift
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Theory stated by Alfred Wegener, which states the continents had moved, and at one time one lager landmass was formed
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Pangea
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The name of the large single landmass that was once formed by all the continents
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Panthalassa
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Meaning all seas, it was the massive ocean that formed around pangea
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Mid- Atlantic Ridge
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Underwater mountain range with a steep, narrow valley running down its center
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Mid- Ocean Ridges
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Consist of 65, 000 km long that wind their way around the oceans floor
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Seafloor Spreading
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Proposed by Harry Hess, when the ocean floor spread apart from the ridge, replaced with rising magma, which coooled and solidified intonew rock
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Plate Tectonics
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The earths plates move, whichexplains continent .movement
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Oceanic Crust
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Material on the ocean floor forms this crust
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Continental Crust
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Makes up the continental landmass
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Lithosphere
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The oceanic and continental crust and the rigid upper part of the antle for the lithosphere
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Asthenosphere
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lies underneath the lithosphere, a layr of plastic rock, that is solid rock that flows like putty, under pressure
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Divergent Boundary
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two plates moving away from eachother
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Rift valley
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narrow valley where plates seperate
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Conergent Boundary
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two colliding plates
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